有以下几种
when对时间（大约）提问
what time对时间提问（具体）
what对事物提问
where对地点提问
how long对时间提问
how often对频度提问 意思是多久一次
would you like对意愿提问，意思是想要…
why对原因提问
who对人提问，意思是谁
How long will it last. 要持续多久 It lasts for 2 hours 持续两小时How soon will you leave 你要过多久离开 In 1 hour 一小时以后＝＝ How long is it before you leave How far is it from here 离这有多远How often do you have a class 你多久上一次课－－－回答：each 40 minutes 每４０分钟上一节课 虽然这里也是＂多久＂ 但是这是强调一个频率 How many times do you play football a week 你一周踢几次足球－－－－回答 4 times四次这一个对话也可以变成 How often do you play football? －－－I play football 4 times a week
